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<?php |
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declare(strict_types=1); |
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namespace TYPO3\PharStreamWrapper; |
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/* |
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* This file is part of the TYPO3 project. |
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* |
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* It is free software; you can redistribute it and/or modify it under the terms |
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* of the MIT License (MIT). For the full copyright and license information, |
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* please read the LICENSE file that was distributed with this source code. |
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* |
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* The TYPO3 project - inspiring people to share! |
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*/ |
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/** |
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* Helper provides low-level tools on file name resolving. However it does not |
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* (and should not) maintain any runtime state information. In order to resolve |
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* Phar archive paths according resolvers have to be used. |
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* |
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* @see \TYPO3\PharStreamWrapper\Resolvable::resolve() |
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*/ |
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class Helper |
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{ |
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/* |
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* Resets PHP's OPcache if enabled as work-around for issues in `include()` |
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* or `require()` calls and OPcache delivering wrong results. |
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* |
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* @see https://bugs.php.net/bug.php?id=66569 |
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*/ |
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public static function resetOpCache() |
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{ |
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if (function_exists('opcache_reset') |
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&& function_exists('opcache_get_status') |
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&& !empty(@opcache_get_status()['opcache_enabled']) |
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) { |
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@opcache_reset(); |
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} |
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} |
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/** |
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* Determines base file that can be accessed using the regular file system. |
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* For e.g. "phar:///home/user/bundle.phar/content.txt" that would result |
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* into "/home/user/bundle.phar". |
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* |
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* @param string $path |
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* @return string|null |
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*/ |
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public static function determineBaseFile(string $path) |
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{ |
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$parts = explode('/', static::normalizePath($path)); |
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while (count($parts)) { |
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$currentPath = implode('/', $parts); |
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if (@is_file($currentPath) && realpath($currentPath) !== false) { |
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return $currentPath; |
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} |
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array_pop($parts); |
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} |
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return null; |
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} |
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/** |
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* @param string $path |
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* @return bool |
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*/ |
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public static function hasPharPrefix(string $path): bool |
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{ |
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return stripos($path, 'phar://') === 0; |
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} |
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/** |
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* @param string $path |
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* @return string |
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*/ |
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public static function removePharPrefix(string $path): string |
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{ |
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$path = trim($path); |
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if (!static::hasPharPrefix($path)) { |
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return $path; |
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} |
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return substr($path, 7); |
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} |
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/** |
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* Normalizes a path, removes phar:// prefix, fixes Windows directory |
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* separators. Result is without trailing slash. |
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* |
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* @param string $path |
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* @return string |
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*/ |
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public static function normalizePath(string $path): string |
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{ |
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return rtrim( |
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static::normalizeWindowsPath( |
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static::removePharPrefix($path) |
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), |
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'/' |
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); |
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} |
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/** |
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* Fixes a path for windows-backslashes and reduces double-slashes to single slashes |
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* |
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* @param string $path File path to process |
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* @return string |
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*/ |
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public static function normalizeWindowsPath(string $path): string |
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{ |
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return str_replace('\\', '/', $path); |
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} |
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/** |
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* Resolves all dots, slashes and removes spaces after or before a path... |
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* |
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* @param string $path Input string |
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* @return string Canonical path, always without trailing slash |
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*/ |
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private static function getCanonicalPath($path): string |
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{ |
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$path = static::normalizeWindowsPath($path); |
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$absolutePathPrefix = ''; |
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if (static::isAbsolutePath($path)) { |
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if (static::isWindows() && strpos($path, ':/') === 1) { |
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$absolutePathPrefix = substr($path, 0, 3); |
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$path = substr($path, 3); |
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} else { |
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$path = ltrim($path, '/'); |
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$absolutePathPrefix = '/'; |
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} |
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} |
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$pathParts = explode('/', $path); |
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$pathPartsLength = count($pathParts); |
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for ($partCount = 0; $partCount < $pathPartsLength; $partCount++) { |
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// double-slashes in path: remove element |
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if ($pathParts[$partCount] === '') { |
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array_splice($pathParts, $partCount, 1); |
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$partCount--; |
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$pathPartsLength--; |
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} |
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// "." in path: remove element |
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if (($pathParts[$partCount] ?? '') === '.') { |
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array_splice($pathParts, $partCount, 1); |
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$partCount--; |
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$pathPartsLength--; |
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} |
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// ".." in path: |
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if (($pathParts[$partCount] ?? '') === '..') { |
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if ($partCount === 0) { |
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array_splice($pathParts, $partCount, 1); |
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$partCount--; |
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$pathPartsLength--; |
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} elseif ($partCount >= 1) { |
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// Rremove this and previous element |
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array_splice($pathParts, $partCount - 1, 2); |
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$partCount -= 2; |
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$pathPartsLength -= 2; |
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} elseif ($absolutePathPrefix) { |
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// can't go higher than root dir |
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// simply remove this part and continue |
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array_splice($pathParts, $partCount, 1); |
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$partCount--; |
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$pathPartsLength--; |
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} |
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} |
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} |
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return $absolutePathPrefix . implode('/', $pathParts); |
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} |
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/** |
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* Checks if the $path is absolute or relative (detecting either '/' or |
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* 'x:/' as first part of string) and returns TRUE if so. |
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* |
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* @param string $path File path to evaluate |
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* @return bool |
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*/ |
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private static function isAbsolutePath($path): bool |
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{ |
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// Path starting with a / is always absolute, on every system |
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// On Windows also a path starting with a drive letter is absolute: X:/ |
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return ($path[0] ?? null) === '/' |
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|| static::isWindows() && ( |
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strpos($path, ':/') === 1 |
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|| strpos($path, ':\\') === 1 |
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); |
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} |
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/** |
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* @return bool |
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*/ |
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private static function isWindows(): bool |
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{ |
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return stripos(PHP_OS, 'WIN') === 0; |
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} |
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} |
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If you suppress an error, we recommend checking for the error condition explicitly: